chore: resolve readme errors

Author: aman-095

lib/node_modules/@stdlib/blas/base/igamax/README.md

@@ -18,7 +18,7 @@ limitations under the License.
 
 -->
 
-# idamax
+# igamax
 
 > Find the index of the first element having maximum absolute value.
 
@@ -27,10 +27,10 @@ limitations under the License.
 ## Usage
 
 ```javascript
-var idamax = require( '@stdlib/blas/base/idamax' );
+var igamax = require( '@stdlib/blas/base/igamax' );
 ```
 
-#### idamax( N, x, strideX )
+#### igamax( N, x, strideX )
 
 Finds the index of the first element having maximum absolute value.